There is also the risk of disease being introduced, which can further threaten native populations.

They also introduced European diseases that the native people had no immunity against.

It is estimated that 10 to 20 percent of the indigenous population soon died from diseases introduced by foreigners.

Indians of the period died at extremely high rates from diseases introduced by European settlers.

The people may have succumbed to new infectious diseases introduced by the Europeans.

Their high death rate is due to malnutrition, through ecological change, as well as introduced diseases.

Many people were killed by diseases, including venereal disease, introduced by the Europeans.

These include introducing diseases and transporting parasites into wildlife habitat.

Their bite is also toxic, introducing various diseases and micro-organisms into the bloodstream.

The Shanti virus is a fictional life-threatening disease, first introduced in season one, which attacks the blood cells.